Its purpose is very clear from its name itself i.e. System

Dvelopment Life Cycle. It consists of all the phases of a

s/w development. I can say that SDLC is the backbone of any

s/w development. If we want to develop an ideal s/w we must

follow any SDLC model. Without uisng any SDLC I think we

can not imagine the development of any S/W.